AP Stats midterm review

Front

What is the probability of drawing a blue marble then a red marble without replacement from a bag containing 3 red, 2 blue, and 1 green marble?

Back

1/5

Front

How many blood donors should the American Red Cross expect to collect from until it gets a donor with Type B blood, given that 11% of the U.S. population has Type B blood?

Back

9.1 donors

Front

What formula would you use to solve the probability of drawing a white chip, then a purple chip, then a black chip from a jar containing 4 white, 5 purple, and 1 black chip?

Back

P(A∩B) = P(A)⋅P(B|A)

Front

What is the probability that a randomly chosen customer holds both a Visa and AA card, given they hold a Visa, from a group of 2000 customers where 1500 hold a Visa, 500 hold an AA card, and 40 hold both?

Back

.0267

Front

What percentage of the area falls below the mean in a normal distribution?

Back

0.5

Front

Define probability in the context of statistics.

Back

Probability is a measure of the likelihood that an event will occur, expressed as a number between 0 and 1.

Front

What is the difference between independent and dependent events in probability?

Back

Independent events do not affect each other's outcomes, while dependent events do.

Front

Explain the concept of conditional probability.

Back

Conditional probability is the probability of an event occurring given that another event has already occurred.

Front

What is the formula for calculating the probability of the union of two events?

Back

P(A∪B) = P(A) + P(B) - P(A∩B)

Front

What does it mean for events to be mutually exclusive?

Back

Mutually exclusive events cannot occur at the same time.